Band resawing-machine.



No. 692,428. Patented Feb. 4, I902.

F. H. CLEMENT.

BAND RESAWING MAGHlNE.

(Application filed. May 17, 1901.)

(Nq model.)

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F. H. CLEMENT. BAND BESAWING MACHINE.

Patented Feb. 4, I902.

(Application filed May 17, 1901.)

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(No Model.)

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No. 692,428. Patented Fab. 4, I902.

F. H. CLEMENT.

BAND BESAWNG MACHINE.

(Application filed May 17; 1901.

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(No Modal'.)

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BAND RESAWlNG-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 692,428, ated February 4, 1902- Application filed May 17, 1901. Serial No. 60,656. (No model.)

To all whom, it may concern.-

Be it known that I, FRANK H. CLEMENT, a citizen of the United States, residing at Rochester,Monroe county,State of New York,have invented certain Improvements in Band Resawing-Machines, of which the followingis a specification.

My invention relates to various details in the construction of band resawing-machines, whereby greater effectiveness in operation and simplicity of construction are obtained, and the machineis thus adapted to a greater range of work than formerly.

In the accompanying drawings, Figure 1 is a front elevation of a complete band-resaw. Fig. 2 is an end elevation. Fig. 3 is an elevation of the feed-rolls and supporting-bar, showing a laterally-adjusted roll and a part of the saw. Figs. 4 and 7 are sections of baradjusting devices. Figs. 5 and 6 are respectively a plan and elevation of the feed-rolls and connected parts on a larger scale than used in Fig. 3.

Similar letters and figures refer to similar parts throughout all the views.

A A, Figs. 1 and 2, are the saw-wheel's, which are carried on shafts a a in boxes 0 C. These boxes are hung on pivots, so as to be self-adjusting, and the upper ones, 0, are swungin bifurcations on the end of the turned pillars D D, which are arranged on each side of the wheelA. These pillars have bearings in columns E E, the first of which is a part of the main frame B, and the latter is bolted to the side of this frame, as indicated in Fig. 2. The outside lower box 0 is also swung on a short bifurcated pillar D, and the latter is adjustable verticall y within short limits by means of bolts through flanges on the pillar and column E. The object of the pillars D D is to equalize the excessive thrust on the wheels caused by the strain of the blade. The main lower box F, Fig. 2, may be also adjustable in its seat on the main frame.

B, Figs. 1 and 3, is a heavy bar, upon which are mounted the roll-housings 18 and 22, they being fitted to slide on a planed way thereon and adjusted at any point longitudinally by means of screws 11 c, the upper one moving housing 18, and the lower housing 22. Bar B is provided at or near the center of its length with a segmental bearing f by which it is attached to the frame B.- This bar and the superincumbent feed-rolls may thus be tilted to an angle with the saw S, as shown in Fig. 3. An equalizing-arm a which is hung on a cross-shaft, works between collars on each screw 1) c and is operated through a suitable link 0 by the pivoted weighted lever D By this means the housings 18 and 22 are moved equally to and from a center line represented by the saw-blade S when they are spread by a plank ordeal between the feed-rolls. Both screws are revolved together by means of a train of gears C and'handle 6 When necessary to revolve the" screws separately the intermediate gear is slipped out of mesh longitudinally on its stud.

F is a main driving-pulley which is rigidly secured to the main shaft (1.

The above description relates to parts which have heretofore been used in machines of this character and are not of themselves the subject of my invention.

The feed apparatus consists of six geared rolls 15 16 1'7 19 2O 21, Figs. 1 and 5, which may be driven in any suitable manner, but are shown here as operated by two worms 33,

.meshing into worm-wheels on the vertical shafts 31, to the upper end of which gears 14 are keyed, so as to mesh into gears 14 on the roll-shafts.

Intermediate gears on studs drive the two small rolls 17 and 21 from the large rolls.

The feed-rolls, Fig. 5, are arranged in sets of three each, Fig. 6 showing a rear elevation. Each set is driven by gears 14, secured to the rolls just above the upper boxes, and these in turn by pinions 14 on the end of verticalshafts 31, having boxes on the housings 18 and 22. Horizontal shafts 32, carrying worms 33, which mesh into worm-wheels on the shafts 31, are in turn driven by a belt from the pulley X on the feed-cone shaft 8*. By this arrangement of driving connections all the gearing and moving parts are placed in a position away from the sawdust and chips, that are so liable to clog up a machine of this kind.

One set of three rolls 15, 16, and 17 is made stationary with reference to the housing 18, in which they are hung, but are adjustable therein, as described below. The other set of three rolls 19, 20, and 21 is hung in the housing 22 upon springs 23, so that each roller is independent to move to or from the lumber at either top or bottom. The main rolls 15, 16, 19, and are journaled in boxes 24 and 24, which fit easily into jaws on the housings 18 and 22, allowing considerable adjustment in and out at right angles to the saw-blade.

In the housings I provide behind the main feed-rolls tubular screws 25, Figs. 7 and 4:, threaded into the casting behind the boxes 24 and 24:, through which bolts 26 pass freely and which are threaded into the roller-boxes.

The tubular screws rest against the boxes in' the case of the rigid rolls and against the springs 23 in the case of the elastic rolls, and the result is that either box on either roll .may be adjusted so as to aline the rollers exactly with the saw-blade S, the bolts 26 acting as clamp-screws to hold the parts in po sition.

In the housing 22 the tubular screws act the same as in housing 18; but the bolts 26 act to compress the springs 23 to any required degree and at the same time clamp the roll-boxes in proper position.

The two small rolls 17 and 21 are mounted in independent yokes 27 28, the latter having springs behind it, as above mentioned. Yoke 27 is made stationary, but may be moved to one side out of relation with the rolls 15 and 16, as shown in dotted lines in Fig. 6. For the purpose of sawing twisted material or short pieces, which is often necessary, the saw S runs quite near to the vertical center line of the small rolls 17 and 21, and therefore when the segment-bar B, Fig. 1, and superimposed rolls are tilted to sawbeveling, as shown in Fig. 3, the roll 17 must be moved out of the path of the saw. One way of accomplishing this is by pivoting the yoke 27 at the point 29 to the housing 18 and securing it in its vertical position by the bolt 30. When tilted over for bevel-sawing, bolt 30 is screwed into another hole 30 to retain the roll safely away from the saw-line. Yoke 27 might move on a way or slide instead of tilting and still accomplish the same purpose. This is an important improvement in machines of this class and enables the rollers to set so close to the tooth edge of the saw-blade for regular parallel sawing that at an ordinary speed of the feed each piece of the stock is cut entirely through without the necessity of pulling the last piece past the saw.

For adjusting the upper shaft transversely I thread the pivot 12, Fig. 1, into alug on the box 0 and revolveit by means of a shaft with universal joint and hand-wheel m, which la tter is thus in a position to be convenient for the operator.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of the band-saw and means for driving the same, with a set of feedrolls adapted to be tilted for beveled sawing comprising main rolls and supplemental rolls lapping the saw, said latter rolls being movable transversely out of the path of the blade to avoid the saw when the set is tilted.

2. The combination of the band-saw and means for driving the same, a set of feed-rolls comprising main rolls and supplemental rolls lapping the saw, an independent yoke for each of said latter rolls, one of said yokes being transversely adjustable.

3. The combination of the band-saw and means for driving the same, a set of feed-rolls comprising main rolls and supplemental rolls lapping the saw, an independent yoke for each of said latter rolls, one of said yokes being transversely adjustable, and the other supported by springs and thereby made automatically adjustable.

4-. The combination of a band-saw and means for driving the same, with a set of feedrolls comprising main rolls and supplemental rolls lapping the saw, and supporting-yokes, one of said yokes being pivoted to swing to and from the saw.

5. The combination of a baud=saw and means for driving the same, with a set of feedrolls comprising main rolls and supplemental rolls lapping the saw, and supporting-yokes, one of said yokes being pivoted to swing to and from the saw,the other yoke being springsupported.

In witness whereof I have hereto subscribed my name in the presence of two witnesses.

FRANK H. CLEMENT.

Witnesses:

G. CLARK SOUTHARD, BENJ. H. CLEMENT. 

